Heavy to Excessive Rainfall and Flooding Threats in the Central and Eastern U.S.; Heat and Fire Weather Concerns in the West

Thunderstorms producing excessive rainfall and potential flooding concerns will continue through tonight from the Southern Plains to the East Coast. Areas of greatest concern for flooding are over central Texas and the Mid-Atlantic. Heat will continue to build across the West through Tuesday. Heat Advisories and Extreme Heat Warnings are in effect. Fire Weather concerns continue through Monday. Read More >

Hazardous Weather Conditions

Flood Watch until July 13, 07:00 PM CDT

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

83°F

28°C

Humidity	74%
Wind Speed	N 5 mph
Barometer	30.00 in (1015.2 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	90°F (32°C)
Last update	13 Jul 3:56 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles SW San Marcos TX

Flood Watch July 13, 04:12pm until July 13, 07:00pm

Click here for hazard details and duration

Flood Watch

Flood Watch July 13, 04:12pm until July 13, 07:00pm
NOW until 7:00pm Sun
Flood Watch
This Afternoon
High: 88 °F
T-storms
Likely
Tonight
Low: 73 °F
T-storms
Likely then
Slight Chance
T-storms
Monday
High: 91 °F
Mostly Cloudy
then Chance
T-storms
Monday Night
Low: 74 °F
Mostly Cloudy
Tuesday
High: 91 °F
Mostly Cloudy
then Slight
Chance
T-storms
Tuesday Night
Low: 74 °F
Slight Chance
T-storms then
Mostly Cloudy
Wednesday
High: 93 °F
Mostly Sunny
Wednesday Night
Low: 72 °F
Mostly Clear

Detailed Forecast

This Afternoon

Showers and thunderstorms likely. Mostly cloudy, with a high near 88. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 73. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91. Heat index values as high as 101. Calm wind becoming south southwest around 5 mph in the morning.

Monday Night

Mostly cloudy, with a low around 74. South wind around 5 mph.

Tuesday

A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 91. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Tuesday Night

A slight chance of thunderstorms before 7pm. Mostly cloudy, with a low around 74. South southeast wind 5 to 10 mph. Chance of precipitation is 10%.

Wednesday

Mostly sunny, with a high near 93. South wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday Night

Mostly clear, with a low around 72. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Thursday

Mostly sunny, with a high near 93. South wind 5 to 10 mph.

Thursday Night

Partly cloudy, with a low around 72.

Friday

Mostly sunny, with a high near 93.